package com.leyou.user.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.leyou.common.exceptions.LyException;
import com.leyou.common.utils.RegexUtils;
import com.leyou.user.dto.UserDTO;
import com.leyou.user.entity.User;
import com.leyou.user.mapper.UserMapper;
import com.leyou.user.service.UserService;
import org.apache.commons.lang3.RandomStringUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.leyou.common.constants.MQConstants.ExchangeConstants.SMS_EXCHANGE_NAME;
import static com.leyou.common.constants.MQConstants.RoutingKeyConstants.VERIFY_CODE_KEY;

/**
 * @author 虎哥
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Autowired
    private AmqpTemplate amqpTemplate;

    @Autowired
    private BCryptPasswordEncoder passwordEncoder;

    private static final String KEY_PREFIX = "user:verify:code:";

    @Override
    public Boolean checkDataExists(String data, Integer type) {
        // 健壮性判断
        if(type != 1 && type != 2){
            throw new LyException(400, "参数类型错误！");
        }
        // 查询
        Integer count = query()
                .eq(type == 1, "username", data)
                .eq(type == 2, "phone", data)
                .count();
        // 判断是否存在
        return count != 0;
    }

    @Override
    public void sendCode(String phone) {
        // 1.校验手机号码格式
        if (!RegexUtils.isPhone(phone)) {
            // 手机号格式错误
            throw new LyException(400, "手机号格式错误！");
        }
        // 2.生成随机验证码
        String code = RandomStringUtils.randomNumeric(6);
        // 3.发送短信
        Map<String,String> msg = new HashMap<>();
        msg.put("phone", phone);
        msg.put("code", code);
        amqpTemplate.convertAndSend(SMS_EXCHANGE_NAME, VERIFY_CODE_KEY, msg);

        // 4.存入redis
        redisTemplate.opsForValue().set(KEY_PREFIX + phone, code, 5, TimeUnit.MINUTES);
    }

    @Override
    public void register(User user, String code) {
        // 1.校验验证码是否正确
        String cacheCode = redisTemplate.opsForValue().get(KEY_PREFIX + user.getPhone());
        if (!StringUtils.equals(code, cacheCode)) {
            // 验证码错误
            throw new LyException(400, "验证码错误");
        }
        //TODO 2.校验用户信息

        // 3.对密码加密
        user.setPassword(passwordEncoder.encode(user.getPassword()));

        // 4.写入数据库
        save(user);
    }

    @Override
    public UserDTO queryByUsernameAndPassword(String username, String password) {
        // 1.根据用户名查询用户
        User user = query().eq("username", username).one();
        // 2.判断是否为空
        if (user == null) {
            // 用户名错误
            throw new LyException(400, "用户名或密码错误！");
        }
        // 3.用户名正确，校验密码
        if (!passwordEncoder.matches(password, user.getPassword())) {
            // 密码错误
            throw new LyException(400, "用户名或密码错误！");
        }
        // 4.转换DTO并返回
        return new UserDTO(user);
    }
}